_Aliens/assets/module_aliens/Script/Components/ScreenShotComponent.ts

import { _decorator, Camera, Component, director, Node, Quat, RenderTexture, Sprite, SpriteFrame, Vec3 } from 'cc';
import { AliensGlobalInstance } from '../AliensGlobalInstance';
import { EventDispatcher } from 'db://assets/core_tgx/easy_ui_framework/EventDispatcher';
import { GameEvent } from '../Enum/GameEvent';
import { GameUtil } from '../GameUtil';
import { tgxUITips } from 'db://assets/core_tgx/tgx';
import { AliensAudioMgr } from '../Manager/AliensAudioMgr';
const { ccclass, property } = _decorator;
/** 截图组件脚本*/
@ccclass('ScreenShotComponent')
export class ScreenShotComponent extends Component {

    @property(Sprite)
    public sprite: Sprite = null!;

    _renderTex: RenderTexture | null = null;

    private _originalTargetTexture: RenderTexture | null = null;
    private _originalCameraPosition: Vec3 = new Vec3();
    // private _originalCameraRotation: Vec3 = new Vec3();

    private _originalCameraRotation: Quat = new Quat();

    private _shouldFlipImage: boolean = true;

    private _index: number = 0;

    //渲染的目标节点
    private _targetNode: Node = null!;

    protected onLoad(): void {
        this.registerEvent();
    }

    private registerEvent() {
        EventDispatcher.instance.on(GameEvent.EVENT_CAMERA_SCREENSHOT, this.screenShot, this);
        EventDispatcher.instance.on(GameEvent.EVENT_CAMERA_SHOOT_ENEMY, this.shootEnemy, this);
    }

    private unregisterEvent() {
        EventDispatcher.instance.off(GameEvent.EVENT_CAMERA_SCREENSHOT, this.screenShot, this);
        EventDispatcher.instance.off(GameEvent.EVENT_CAMERA_SHOOT_ENEMY, this.shootEnemy, this);
    }

    //截图
    public async screenShot() {
        AliensAudioMgr.playOneShot(AliensAudioMgr.getMusicIdName(7), 1.0);
        this.node.active = true;
        const camera = await this.getSceneCamera();
        this._targetNode = await this.getTargetNode();

        if (!this._targetNode) return;

        // 创建新的RenderTexture
        const renderTex = new RenderTexture();
        renderTex.reset({
            width: 150,
            height: 110,
        });

        // 保存原始相机状态
        this._originalTargetTexture = camera.targetTexture;
        camera.node.getWorldPosition(this._originalCameraPosition);
        camera.node.getWorldRotation(this._originalCameraRotation);

        // 设置相机位置和朝向
        const targetViewPos = new Vec3(
            this._targetNode.worldPosition.x,
            this._targetNode.worldPosition.y + 1, 
            this._targetNode.worldPosition.z + 0.7
        );

        camera.node.worldPosition = targetViewPos;
        camera.node.lookAt(this._targetNode.worldPosition);
        // 设置相机的目标纹理
        camera.targetTexture = renderTex;

        // 等待两帧确保渲染完成
        await new Promise(resolve => this.scheduleOnce(resolve, 0.1));

        // 创建新的SpriteFrame并设置翻转
        const newSpriteFrame = new SpriteFrame();
        newSpriteFrame.texture = renderTex;
        newSpriteFrame.flipUVY = this._shouldFlipImage;

        // 更新Sprite显示
        this.sprite.spriteFrame = newSpriteFrame;
        this.sprite.markForUpdateRenderData(true);

        // 恢复相机状态
        camera.targetTexture = this._originalTargetTexture;
        camera.node.setWorldPosition(this._originalCameraPosition);
        camera.node.setRotation(this._originalCameraRotation);
    }

    private _shootCount: number = 0;
    //击杀了场景怪物 隐藏侦探节点
    private shootEnemy(enemy: Node) {
        if (!this.node.active || !this._targetNode) return;

        if (enemy == this._targetNode) {
            this.scheduleOnce(() => {
                this._shootCount++; // 增加计数
                if (this._shootCount > 0) {
                    this._shouldFlipImage = false;
                }
                this.node.active = false;
            }, 1);
        }
    }

    //获取场景相机
    private async getSceneCamera(): Promise<Camera> {
        return new Promise<Camera>((resolve, reject) => {
            const levelNode = AliensGlobalInstance.instance.levels.children[0];
            if (!levelNode) { return; }

            const camera = levelNode.getComponentInChildren(Camera)!;
            resolve(camera);
        });
    }

    //获取目标节点
    private async getTargetNode(): Promise<Node> {
        return new Promise<Node>((resolve, reject) => {
            const levelNode = AliensGlobalInstance.instance.levels.children[0];
            const et = levelNode.getChildByName('Ets');

            this._index++;
            if (this._index >= et.children.length) {
                this._index = 0;
            }

            resolve(et.children[this._index]);
        });
    }

    //更新相机最新的位置和旋转角度
    public saveCameraState(pos: Vec3, rotation: Vec3) {
        this._originalCameraPosition = pos;
        // 将Vec3欧拉角转换为Quat
        const quat = new Quat();
        Quat.fromEuler(quat, rotation.x, rotation.y, rotation.z);
        this._originalCameraRotation.set(quat);
    }

    protected onDestroy(): void {
        this.unregisterEvent();
    }
}